Colossians 4:6

let your talk always have a saving salt of grace about it, and learn how to answer any question put to you.

Matthew 5:13

You are the salt of the earth. But if salt becomes insipid, what can make it salt again? After that it is fit for nothing, fit only to be thrown outside and trodden by the feet of men.

Mark 9:49-50

Everyone has to be consecrated by the fire of the discipline.

Treasury of Scripture Knowledge

Summary

And every oblation of thy meat offering shalt thou season with salt; neither shalt thou suffer the salt of the covenant of thy God to be lacking from thy meat offering: with all thine offerings thou shalt offer salt.

Bible References

With salt

Matthew 5:13
You are the salt of the earth. But if salt becomes insipid, what can make it salt again? After that it is fit for nothing, fit only to be thrown outside and trodden by the feet of men.
Mark 9:49
Everyone has to be consecrated by the fire of the discipline.
Colossians 4:6
let your talk always have a saving salt of grace about it, and learn how to answer any question put to you.